html,body,div,span,applet,object,iframe,h1,h2,h3,h4,h5,h6,p,blockquote,pre,a,abbr, acronym,address,big,cite,code,del,dfn,em,font,img,ins,kbd,q,s,samp,small,strike,strong,
 sub,sup,tt,var,b,u,i,center,dl,dt,dd,ol,ul,li,fieldset,form,label,legend,table,caption, tbody,tfoot,thead,tr,th,td{border:0;outline:0;vertical-align:baseline; background:transparent;margin:0;padding:0;}
body{line-height:1;}
ol,ul{list-style:none;}
blockquote,q{quotes:none;}
blockquote:before,blockquote:after,q:before,q:after{content:none;}
:focus{outline:0;}
ins{text-decoration:none;}
del{text-decoration:line-through;}
table{border-collapse:collapse;border-spacing:0;}
input,button{border: none;} /*清除边框*/
input,textarea,select{
    background: none;
}
a {color: #ccc;}
/*清除浮动*/
.clearfix:after {
    content: "";
    display: block;
    clear: both;
}
.clearfix {
    zoom:1;
}
.fl {
    float: left;
}
.fr {
    float: right;
}
————————————————
版权声明：本文为CSDN博主「YXB413」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/YXB413/article/details/82982149